Specifications: 6.5 inch (16.5 cm) coaxial 3-way speaker.
Maximum Input: 90W
Rated Input: 45W
Nominal Impedance: 4 ohms
Frequency response: 52Hz - 20kHz
Efficiency: 91dB
Mounting hole diameter: 5.5 inches (140 mm) (woofer part)
Mounting depth: 2.1 inches (54.5 mm) (woofer part)
Speaker grille: Size (W x H): 6.7 x 0.7 inches (171 x 18 mm).